GD/XP Syringe Filter, PES, 0.45um (150 pcs)
Whatman SKU: 6995-2504

Whatman GD/XP Polyethersulfone (PES) Syringe Filters, 0.45 µm, 25 mm, 150/Pk - 6995-2504

Whatman's established manufacturing platform delivers the consistency and lot-level documentation that analytical laboratories require. A syringe filter seats a membrane in a sealed housing that threads onto a standard luer fitting. PES minimizes protein binding to maximize sample and analyte recovery while staying stable across the pH 1 to 14 range and draws aqueous samples through without pre-wetting. Polypropylene construction holds extractable contribution low for sensitive analyses and stays inert across common laboratory solvents. When method reproducibility rests on consistent sample prep, syringe filtration holds that standard injection after injection.

Technical Specifications

• Naturally hydrophilic surface wets without pre-wetting in aqueous applications
• Stable across the full pH 1 to 14 operating range
• High flow rate with low extractable background for clean preparations
• Broad compatibility with aqueous buffers, aliphatic alcohols, glycols, and strong bases
• Absolute pore size rating gives consistent results across protocols

Housing Specifications

• Reliable housing-to-membrane seal prevents bypass at rated pressure
• Optimized internal geometry minimizes backpressure in service
• Low extractable contribution protects sensitive downstream analyses
• Resists aqueous acids, bases, and alcohols in routine sample prep

Upstream clarification pays for itself by keeping your columns clear and your analytical day on schedule. Upstream sample clarification keeps your separations clean and reproducible across your HPLC and UHPLC methods. Send your application details to our technical service team and request a filtration product recommendation.

For more information about chemical compatibility, please review our Chemical Compatibility Chart.

Bubble Point (psi)

2.3 bar (33 psi)

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

25mm

Filtration Area

4.6cm²

Holdup Volume

1.4ml

Material

Polyethersulfone (PES)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

150

Pore Size (µm)

0.45

Prefilter (Yes/No)

Yes

Prefilter Material

Polypropylene (10µm + 5µm)

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophilic

• Biological Sample Prep - The low protein-binding nature of PES ensures maximum recovery of critical enzymes and proteins
• Ion Chromatography - The extremely low extractable profile of PES provides the clean baselines needed for sensitive IC analysis
• Culture Media Filtration - PES offers the fastest flow rates for viscous culture media while maintaining absolute sterility
• Life Science Applications - Ideal for filtering serum and plasma, where minimizing nonspecific binding is crucial for assay accuracy
• Research & Development - Supports protocols that need to remove particulates, providing the ability to protect analytical instruments
• General Laboratory Filtration - Increases workflow efficiency by protecting analytical instruments without sacrificing flow rates